Machine for forming paving-blocks



(No Model.)

1 G. Ross.

MACHINE FOR FORMING-PAVING BLOCKS. No. 292,365.

Patehted Jan. 22, 1884.

NITED, STATES PATENT OFFICE.

DONALD e. ROSS, or HATTON, MICHIGAN.

MACHIN E FOR FORMING PAVING-BLOCKS.

SPECIFICATION forming part .of Letters Patent No. 292,365, dated January 22,1584.

Application filed October 16, 1883. (No model.)

To all whom it may concern.-

Be it known that I, DONALD G. Ross, of Hatton P. 0., in the county of Clare and State of Michigan, have invented newand useful Improvements in Machines for Forming Paving-Blocks; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this speci: fication.

This invention relates to certain new and useful improvements in machines for sizing and trimming wood paving'blocks.

In specifying wood pavements laid with cedar blocks or other wood, it is now common to limit the diameter of such blocks to between four and ten inches,- or thereabout. This excludes for use in wood paving a large amount of timber, for it is well known that cedar, which forms the bulk of material used for wood paving, grows to a diameter above that allowed for the size of paving-blocks; and the object of my invention is to construct a machine by means of which such pavingblocks whichexceed in diameter the largest allowable size may be reduced to prescribed sizes.

Another object of my machine is also to make use of the sound material inpartly decayed or rotten wood p. ving-blocks, which generally occurs'in the blocks of larger diame ter.

In the drawings which accompany this specification my machine is shown, in Figure 1, in a perspective view; in Fig. 2, as a vertical section thereof. a

A represents the bed-frame, suitably constructed to support the operating parts.

B B are two standards near the front end.

0 is a gate secured to said standards by prop er guides, so as to adapt it to be reciprocated between such guides.

D is a pitman pivotally secured upon the lower side of the gate.

E is a'crank for actuating the pitman.

F is the main drive-shaft,properly journaled to the frame, and provided upon one end with a driver, G. o

I His a table supported upon the frame between the standards B.

I I are cylindrical ring cutters or dies secured to the bed-plate H, and provided with ing all superfluous material.

L and M are counter-shafts journaled upon opposite sides of the frame, and provided with pulleys and transverse belts N N. p

O is a pulley upon the shaft L, and receives 'motion by means of a belt and pulley, I, from the main drive-shaft.

In practice the operator or operators, standing at the front end of the table, place such paving-blocks which have to be sized down or trimmed off (rounded off) upon such one of the dies the diameter of which allows the largest possible paving-block to be cut. The gate 0, upon descending, presses. with its head K (which issuitably' re-enforced) upon the top of the paving-blocks, pressing them down into the hollow space of the dies, and remov- As soon as the gate has sufficicntly lifted, new paving-blocks are put upon the dies, which in turn will be sized or trimmed by the dies, expellingthe blocks from the ring-cutters, which have been pressed into the same by the preceding operation. The belts N N below the table are suitably arranged, one for carrying off the sized or trimmed paving-blocks and the other one for carrying ofi the debris. -Where paving-blocks of large size are decayed or rotten in the center or some other part, the workmen divide them into several pieces large enough to form, after trimming, a round block of large enough diameter to be useful for paving.

Besides using my machine forsizing and trimming paving-blocks, I-also intend to make use of the same for removing the bark whenever this is required.

: What I claim as my invention is' 1. In a machine for sizing and trimming paving-blocks, a series of dies or circular cutters having an opening at the bottom as large as at the cutting-edge, stationarily secured in a bed-plate, in combination with a reciprocati-ng gate or plunger, substantially as and for the purposes described.

2. In a machine for sizing or trimming paving-blocks, the combination of the following parts: a series of dies or ring-cutters, a head, K, ring-cutters I, bed-plate H, crank E,

gate or plunger reciprocating in theaxis of pitman D, main drive-shaft F, and driver G, 10

the ring-cutters, and suitable belts for carryall combined and operating substantially as ing ofi' the finished paving-blocks and the ddescribed.

bris, all arranged and combined substantially as and for the purposes described. I Vitnesses:

3. The combination of the frame A, stand- H. S. SPRAGLE,

ards B B, gate 0, provided with are-enforced E. W. ANDREWS.

DONALD o. ROSS. 

